Grand_Eye_ETX80_90


TELESCOPE	ETX-90PE	ETX-125PE

Optical Design 光學設計	Maksutov-Cassegrain 馬克蘇托夫-卡塞格林	Maksutov-Cassegrain馬克蘇托夫-卡塞格林
Primary Mirror Diameter 主鏡直徑	96mm (3.78")	138mm (5.43")
Clear Aperture 有效口徑	90mm (3.5")	127mm (5.0")
Focal Length, Focal Ratio 焦距, 焦比	1250mm f/13.8	1900mm f/15
Near Focus (approx.) 最近對焦距離	11.5 ft. (3.5m)	15 ft. (4.6m)
Resolving Power (arc secs.) 解像力	1.3	0.9
Optical Coatings 光學鍍膜	MgF2; standard aluminum/SiO	MgF2; standard aluminum/SiO
Ultra-High Transmission Coatings 超高透光鍍膜	Standard accessory 標配	Standard accessory 標配
Limiting Visual Stellar Magnitude 極限星等	11.7	12.5
Image Scale 成像比例	1.16°/inch	0.76°/inch
Maximum Practical Visual Power 最高有效陪數	250X	350X
Optical Tube Dimensions (dia. x length) 鏡筒徑	4.1" x 11" (10.4cm x 27.9cm)	5.75" x 14.2" (14.6cm x 36cm)
Eyepiece 目鏡	Super Plossl 26mm	Super Plossl 26mm
Secondary Mirror Obstruction (dia.; %) 副鏡遮擋	1.1" (27.9mm); 9.6%	1.55" (39.4mm); 9.6%
Telescope Mounting 座架	Fork type; double tine	Fork type; double tine
Setting Circle Diameters	Dec.: 3.5"; R.A.: 7"	Dec.: 4.3"; R.A.: 9"
Motor Drive System 馬達驅動系統	DC servo motors with encoders, both axes; 12-volts 12V 雙軸伺服馬達	DC servo motors with encoders, both axes;12-volts 12V 雙軸伺服馬達
Slow-Motion Controls 微調控制	Electric, 4-speed, both axes 雙軸4速電子驅動	Electric, 4-speed, both axes 雙軸4速電子驅動
Optional Autostar Capability 另選Autostar 功能	Yes	Yes
Hemispheres of Operation 南北半球操控	North and South 南與北	North and South 南與北
Batteries 電池	8 x AA	8 x AA
Battery Life (approx.) 電池壽命
with Electronic Controller 用標準手控	45 hrs.	45 hrs.
with Autostar (optional) 用Autostar	20 hrs.	20 hrs.
Bearings 軸承	Nylon, both axes	Dec: ball bearings; R.A.: ball bearings
Materials: Tube body 鏡筒身	Aluminum 鋁	Aluminum 鋁
Mounting 座架	steel-reinforced high-impact ABS	internal aluminum structure with high-impact ABS
Primary Mirror 主鏡	Pyrex ® glass	Pyrex® glass
Correcting Lens 修正鏡	BK7 optical glass, Grade-A	BK7 optical glass, Grade-A
Telescope Dimensions 望遠鏡大小	15" x 7.3" x 8.5"	19" x 8.9" x 10.8"
Telescope Net Weight 望遠鏝淨重	7.8 lbs (3.5 kg)	15.2 lbs. (6.9 kg)
Telescope Shipping Weight 望遠鏡毛重	12.4 lbs (5.6 kg)	25.2 lbs. (11.4 kg)

ETX-90/125 TUTOR 教室	ETX-125AT $6,350.	ETX SUPERB PACKAGE OFFER WHILE STOCK LAST !!! ETX 超級優惠套餐, 數量有限, 售完即止 ! ETX-90-AT or ETX-125-AT/ UHTC + AUTOSTAR 497 + DELUXE FIELD TRIPOD 884 ETX-90AT $4,200.	Other accessories : SP 26mm eyepiece, Red dot viewfinder, computer cable & tripod bag Price list of ETX accessories
		AUTOSTAR 497 hand controller ETX-90/125 TUTOR 教室	Images taken with ETX-125

Photo 1 L to R: 1.25" eyepiece holder + f/6.3 reducer + ETX adapter	Photo 2 L to R: ETX adapter + f/6.3 reducer + 1.25" eyepiece holder
Photo 3 L to R; SP 26mm eyepiece + 1.25" eyepiece holder + f/6.3 reducer + ETX adapter	Photo 4 L to R: ETX adapter + f/6.3 reducer + M42 ring

ETX配H-alpha濾鏡拍到太陽火焰	DV也可駕上ETX	DC便倍覺輕鬆	3.5"拍到這樣的木星,您也可做得到